How do I reset the iDrive Navigation system on my BMW 6 Series?

The iDrive Navigation system on my BMW 6 Series seems to be frozen and I can't access any of its features. How can I reset the system and get it working again?

First, try a soft reset by holding down the iDrive button for 10 seconds. If that doesn't work, try disconnecting the car's battery for a few minutes and then reconnecting it. If the issue persists, you may need to have the system diagnosed by a certified BMW technician.

I had a similar issue and found that performing a hard reset by holding down the iDrive, volume knob, and radio power button simultaneously for 30 seconds fixed the problem. Give that a try before taking it to a mechanic.